Re: Huawei E3131

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Hi Dan and Bjorn,
  thank you both for your detailed answers on this thread.

Bjørn Mork wrote:
Martin Mokrejs <mmokrejs@xxxxxxxxxxxxxxxxxx> writes:

Hi Bjorn,

    my have a new USB 3G modem sold in Czech Republic by T-Mobile. So
    far it works for me only using the option driver and pppd. The
    'qmi-network /dev/cdc-wdm0' does not work for me. Maybe it has no
    QMI interface ('modprobe qmi_wwan' does not log any new device
    found through dmesg but maybe that is because it is already claimed
    by cdc_ncm driver)? I haven't seen the virtual CD-ROM associated
    media errors with my old Huawei E372. I believe I can ignore them
    but is that because of the modem firmware being ... suboptimal?
    BTW, usb_modeswitch used to log that it flipped a device. Isn't
    this needed anymore?


Dont' know.  Your log shows that the device is switched from 12d1:15ca
to 12d1:1506.  I assume that is usb_modeswitch doint its job:

you are right, I forgot it is not logged in dmesg, here are the lines from syslog:

Aug 12 21:23:19 vostro usb_modeswitch[3541]: switch device 12d1:15ca on 001/003
Aug 12 21:23:21 vostro root[3589]: usb_modeswitch: switched to 12d1:1506 on 001/004


[  301.850141] usb 1-1.1: new high-speed USB device number 3 using xhci_hcd
[  301.954975] usb 1-1.1: New USB device found, idVendor=12d1, idProduct=15ca
[  301.954989] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  301.954995] usb 1-1.1: Product: HUAWEI Mobile
[  301.955000] usb 1-1.1: Manufacturer: HUAWEI
[  301.955014] usb 1-1.1: SerialNumber: FFFFFFFFFFFFFFFF
[  302.002613] usb-storage 1-1.1:1.0: USB Mass Storage device detected
[  302.003190] scsi host7: usb-storage 1-1.1:1.0
[  303.016259] scsi 7:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2
[  303.025890] sr 7:0:0:0: [sr1] scsi-1 drive
[  303.026802] sr 7:0:0:0: Attached scsi CD-ROM sr1
[  303.027482] sr 7:0:0:0: Attached scsi generic sg3 type 5
[  303.031504] scsi 7:0:0:1: Direct-Access     HUAWEI   TF CARD Storage  2.31 PQ: 0 ANSI: 2
[  303.032127] sd 7:0:0:1: Attached scsi generic sg4 type 0
[  303.049740] sd 7:0:0:1: [sdc] Attached SCSI removable disk
[  303.106042] Buffer I/O error on dev sr1, logical block 512, async page read
[  303.359262] usb 1-1.1: USB disconnect, device number 3
[  304.032875] usb 1-1.1: new high-speed USB device number 4 using xhci_hcd
[  304.137604] usb 1-1.1: New USB device found, idVendor=12d1, idProduct=1506
[  304.137617] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  304.137624] usb 1-1.1: Product: HUAWEI Mobile
[  304.137629] usb 1-1.1: Manufacturer: HUAWEI
[  304.554118] huawei_cdc_ncm 1-1.1:1.1: MAC-Address: 82:a9:4a:09:84:2e
[  304.576776] huawei_cdc_ncm 1-1.1:1.1: cdc-wdm0: USB WDM device
[  304.577728] huawei_cdc_ncm 1-1.1:1.1 wwan0: register 'huawei_cdc_ncm' at usb-0000:0b:00.0-1.1, Huawei CDC NCM device, 82:a9:4a:09:84:2e
[  304.579135] usb-storage 1-1.1:1.4: USB Mass Storage device detected
[  304.579425] scsi host8: usb-storage 1-1.1:1.4
[  304.579984] usb-storage 1-1.1:1.5: USB Mass Storage device detected
[  304.580141] scsi host9: usb-storage 1-1.1:1.5
[  304.640300] huawei_cdc_ncm 1-1.1:1.1 wwp11s0u1u1i1: renamed from wwan0

And the last part here shows that your modem has a Huawei specific NCM
interface, handled by the huawei_cdc_ncm driver.  This is not a QMI
modem.

The huawei_cdc_ncm driver also provides a /dev/cdc-wdm0 device, but this
device speaks AT commands, not QMI.  You can use the /dev/cdc-wdm0
device with Huawei specific commands like AT^NDISDUP etc.  Google that
or use a ModemManager supporting it (not sure about the status here,
though...).

      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        1
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass       255 Vendor Specific Class
        bInterfaceSubClass      2
        bInterfaceProtocol     22
        iInterface              8 CDC Network Control Model (NCM)


The string descriptor is right.  255/2/22 is one of the
class/subclass/protocol sets Huawei use for their vendor specific NCM
variants.

OK, thank you, so I will stay with pppd talking to ttyUSB0 at 460800 baudrate. It
is puzzling Huawei sells a different hardware. I thought I could go with my old
setup for Huawei E372 ..., well does not really matter.

Martin
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